Stephano

The 21st moon of Uranus in order from the
planet. Stephano was discovered, together with Prospero
and Setebos, in 1999 by Brett Gladman, Matthew
Holman, and J. J. Kavelaars using the Canada-France-Hawaii
Telescope and given the temporary designation S/1997 U2. It is named
after the drunken butler in Shakespeare's play The Tempest and is also known
as Uranus XX. Setebos is a small, irregular
moon with a highly inclined, retrograde
orbit.